package com.ruoyi.common.component;

import java.awt.image.BufferedImage;
import java.io.*;
import java.nio.file.Paths;
import java.util.Objects;

import com.qiniu.common.QiniuException;
import com.ruoyi.common.config.QiniuFileStoreConfig;
import com.ruoyi.common.config.ServerConfig;
import com.ruoyi.common.utils.file.MimeTypeUtils;
import com.ruoyi.common.utils.file.QiniuCloudFileStoreUtils;
import net.coobird.thumbnailator.Thumbnails;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.DependsOn;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.exception.file.FileNameLengthLimitExceededException;
import com.ruoyi.common.exception.file.FileSizeLimitExceededException;
import com.ruoyi.common.exception.file.InvalidExtensionException;
import com.ruoyi.common.utils.DateUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.uuid.Seq;

import javax.imageio.ImageIO;

/**
 * 文件上传工具类
 *
 * @author ruoyi
 */
@Component
/**
 * @DependsOn("ruoYiConfig")
 * @DependsOn注解可以用来控制bean的创建顺序，该注解用于声明当前bean依赖于另外一个bean。所依赖的bean会被容器确保在当前bean实例化之前被实例化。
 */
public class FileUploadComponent
{

    @Autowired
    QiniuCloudFileStoreUtils qiniuCloudFileStoreUtils;
    @Autowired
    private QiniuFileStoreConfig qiniuFileStoreConfig;
    @Autowired
    private ServerConfig serverConfig;

    /**
     * 默认大小 50M
     */
    public static final long DEFAULT_MAX_SIZE = 50 * 1024 * 1024;

    /**
     * 默认的文件名最大长度 100
     */
    public static final int DEFAULT_FILE_NAME_LENGTH = 100;

    /**
     * 默认上传的地址
     */
    private String defaultBaseDir ;

    public void setDefaultBaseDir(String defaultBaseDir)
    {
        defaultBaseDir = defaultBaseDir;
    }

    public String getDefaultBaseDir()
    {
        return defaultBaseDir != null ? defaultBaseDir: RuoYiConfig.getProfile();
    }

    /**
     * 以默认配置进行文件上传
     *
     * @param file 上传的文件
     * @return 文件名称
     * @throws Exception
     */
    public FileUploadResponse upload(MultipartFile file) throws IOException
    {
        try
        {
            return upload(getDefaultBaseDir(), file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);
        }
        catch (Exception e)
        {
            throw new IOException(e.getMessage(), e);
        }
    }

    /**
     * 根据文件路径上传
     *
     * @param businessTypeDir 文件类型目录
     * @param file 上传的文件
     * @return 文件名称
     * @throws IOException
     */
    public FileUploadResponse upload(String businessTypeDir, MultipartFile file) throws IOException
    {
        try
        {
            return upload(businessTypeDir, file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);
        }
        catch (Exception e)
        {
            throw new IOException(e.getMessage(), e);
        }
    }

    /**
     * 文件上传
     *
     * @param businessTypeDir 相对应用的基目录
     * @param file 上传的文件
     * @param allowedExtension 上传文件类型
     * @return 返回上传成功的文件名
     * @throws FileSizeLimitExceededException 如果超出最大大小
     * @throws FileNameLengthLimitExceededException 文件名太长
     * @throws IOException 比如读写文件出错时
     * @throws InvalidExtensionException 文件校验异常
     */
    public FileUploadResponse upload(String businessTypeDir, MultipartFile file, String[] allowedExtension)
            throws Exception {
        int fileNamelength = Objects.requireNonNull(file.getOriginalFilename()).length();
        if (fileNamelength > FileUploadComponent.DEFAULT_FILE_NAME_LENGTH)
        {
            throw new FileNameLengthLimitExceededException(FileUploadComponent.DEFAULT_FILE_NAME_LENGTH);
        }
        assertAllowed(file, allowedExtension);
        String fileName = extractFilename(file);
        FileUploadResponse response = new FileUploadResponse();
        response.setFileName(fileName);
        //是否开启了七牛云存储
        if(QiniuFileStoreConfig.getEnabled())
        {
            String filePath = qiniuCloudFileStoreUtils.qiniuFileUpload(businessTypeDir,file);
            response.setPathFileName("/"+filePath);
            response.setFileUrl(qiniuFileStoreConfig.getDomain()+"/"+filePath);
            response.setStorePlatform("qiniu");
        }else {
            //绝对路径
            String absPath = getAbsoluteFile(getDefaultBaseDir()+"/"+businessTypeDir, fileName).getAbsolutePath();
            //保存文件到本地
            file.transferTo(Paths.get(absPath));
            //获取文件相对路径
            String pathFileName = getPathFileName(getDefaultBaseDir()+"/"+businessTypeDir, fileName);
            response.setPathFileName(pathFileName);
            response.setFileUrl( serverConfig.getUrl() + pathFileName);
        }
        return response;
    }

    /**
     * 编码文件名
     */
    public static final String extractFilename(MultipartFile file)
    {
        return StringUtils.format("{}/{}_{}.{}", DateUtils.dateTime(),
                FilenameUtils.getBaseName(file.getOriginalFilename()), Seq.getId(Seq.uploadSeqType), getExtension(file));
    }

    public static final File getAbsoluteFile(String uploadDir, String fileName) throws IOException
    {
        File desc = new File(uploadDir + File.separator + fileName);

        if (!desc.exists())
        {
            if (!desc.getParentFile().exists())
            {
                desc.getParentFile().mkdirs();
            }
        }
        return desc;
    }

    public static final String getPathFileName(String uploadDir, String fileName) throws IOException
    {
        int dirLastIndex = RuoYiConfig.getProfile().length() + 1;
        String currentDir = StringUtils.substring(uploadDir, dirLastIndex);
        return Constants.RESOURCE_PREFIX + "/" + currentDir + "/" + fileName;
    }

    /**
     * 文件大小校验
     *
     * @param file 上传的文件
     * @return
     * @throws FileSizeLimitExceededException 如果超出最大大小
     * @throws InvalidExtensionException
     */
    public static final void assertAllowed(MultipartFile file, String[] allowedExtension)
            throws FileSizeLimitExceededException, InvalidExtensionException
    {
        long size = file.getSize();
        if (size > DEFAULT_MAX_SIZE)
        {
            throw new FileSizeLimitExceededException(DEFAULT_MAX_SIZE / 1024 / 1024);
        }

        String fileName = file.getOriginalFilename();
        String extension = getExtension(file);
        if (allowedExtension != null && !isAllowedExtension(extension, allowedExtension))
        {
            if (allowedExtension == MimeTypeUtils.IMAGE_EXTENSION)
            {
                throw new InvalidExtensionException.InvalidImageExtensionException(allowedExtension, extension,
                        fileName);
            }
            else if (allowedExtension == MimeTypeUtils.FLASH_EXTENSION)
            {
                throw new InvalidExtensionException.InvalidFlashExtensionException(allowedExtension, extension,
                        fileName);
            }
            else if (allowedExtension == MimeTypeUtils.MEDIA_EXTENSION)
            {
                throw new InvalidExtensionException.InvalidMediaExtensionException(allowedExtension, extension,
                        fileName);
            }
            else if (allowedExtension == MimeTypeUtils.VIDEO_EXTENSION)
            {
                throw new InvalidExtensionException.InvalidVideoExtensionException(allowedExtension, extension,
                        fileName);
            }
            else
            {
                throw new InvalidExtensionException(allowedExtension, extension, fileName);
            }
        }
    }

    /**
     * 判断MIME类型是否是允许的MIME类型
     *
     * @param extension
     * @param allowedExtension
     * @return
     */
    public static final boolean isAllowedExtension(String extension, String[] allowedExtension)
    {
        for (String str : allowedExtension)
        {
            if (str.equalsIgnoreCase(extension))
            {
                return true;
            }
        }
        return false;
    }

    /**
     * 获取文件名的后缀
     *
     * @param file 表单文件
     * @return 后缀名
     */
    public static final String getExtension(MultipartFile file)
    {
        String extension = FilenameUtils.getExtension(file.getOriginalFilename());
        if (StringUtils.isEmpty(extension))
        {
            extension = MimeTypeUtils.getExtension(Objects.requireNonNull(file.getContentType()));
        }
        return extension;
    }

    /**
     * 删除文件
     *
     * @param response
     * @return 后缀名
     */
    public void deleteFile(FileUploadResponse response)
    {
        if(null == response || StringUtils.isEmpty(response.getPathFileName()))
        {
            return;
        }
        //判断文件平台类型
        if("qiniu".equals(response.getStorePlatform()))
        {
            try {
                qiniuCloudFileStoreUtils.deleteSingleFile(response.getPathFileName());
            }catch (QiniuException e)
            {
                e.printStackTrace();
            }
        }else if("local".equals(response.getStorePlatform()))
        {
            if(response.getPathFileName().length() <= Constants.RESOURCE_PREFIX.length())
            {
                //文件名称路径的长度 小于前缀的长度，无法进行删除
                return;
            }
            try {
                String filePathName = response.getPathFileName().substring(Constants.RESOURCE_PREFIX.length());
                System.out.println("filePathName="+filePathName);
                FileUtils.delete(new File(RuoYiConfig.getProfile()+filePathName));
            }catch (IOException e)
            {
                e.printStackTrace();
            }
        }

    }
    public static void main(String[] args) throws IOException {
        String fileName = "/sourceotes/abcc.doc";
        String filePathName = fileName.substring(Constants.RESOURCE_PREFIX.length());
        System.out.println(filePathName);
       /*BufferedImage bufferedImage =  Thumbnails.of("C:\\Users\\Administrator\\Desktop\\限时秒杀_files\\我的照片_163324_temp1.jpg")
                .scale(0.5)
                .outputQuality(0.5).asBufferedImage();
                //.toFile("C:\\Users\\Administrator\\Desktop\\限时秒杀_files\\我的照片_163324_temp2.jpg");
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        ImageIO.write(bufferedImage, "我的照片_163324_temp1.jpg", os); //图片写入到 ImageOutputStream
        InputStream inputStream = new ByteArrayInputStream(os.toByteArray());*/


    }
}
